Thanks for the hint, illuminarti, but maybe what's been described there might not meet the effect I wrote about.
For the moment, this axial movement does not cause bad prints - its more that I think if I let it as it is that it might cause wear off or disadjusting problems in the future. And the KLACK sound is enerving somehow as I had some issues with warping at small overhangs before and when the nozzle came across these it hits the tiny things standing in the way what also causes a bad sound similar to the KLACK. Not as loud and clear but too loud to ignore. And so I would be happy if I could fix this, So if I hear a bad sound in future I would love to be sure that it does not come from backlash or things like that.
I just looked further into the construction and found that also the left shaft hat sich backlash but does not move axial during the print. The 3D file published by Ultimaker shows a distance of exactly 1 mm between bearing and pulley on the back side. The question is if this is wanted or if this will be adjusted to ZERO during assembly. I don't want to build problems into a running machine but if it is something that better should be fixed, I'd like to fix.
thanks and cheers
See this other thread from today:
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